This paper presents the analysis o f measures to reduce pollutant emissions o f taxiing aircraft at Belgrade Airport, motivated by one o f the Flighpath 2050 goals that aircraft movements should be emission-free when taxiing. Fuel burn and pollutant emissions are quantified for basic scenario for year 2019, and compared to three alternative scenarios: single engine taxiing, dispatch towing and electric taxiing. For a mid-size airport like Belgrade Airport the priority should be given to single engine taxi procedure because it is not associated with additional implementation costs, unlike the other two scenarios; and estimated benefit is only somewhat smaller compared to electric taxiing case and almost the same as in dispatch towing case.

The unimaginable speed of the development of information and communication technologies has led to the fact that in the time period from 2009 to 2012, human society generated and saved more information than in the entire history until then. As estimated in 2013, approximately 1,200 exabytes were generated around the world, and this vast amount of information is doubled every three years. This would mean that estimated amount of generated data for 2019 is approximately 4800 exabytes, that is, three times more than the total amount information generated throughout the history. Since such a large amount of information cannot be stored or processed (and especially not in real or reasonable time) using the common methods of storing and processing data, a new paradigm of storage, processing and management of large quantities, variety and data processing speed has emerged under the name big data concept.

Cloud computing is a new technology that represents the realization of an old idea that computer data processing is executed and charged as a service. The goal of this chapter is to define the basics of the cloud computing concept and how this technology works, and then explain where is all the data that cloud computing uses, how they are distributed, how and to what extent are available, who are the ultimate beneficiaries, what are the advantages and the disadvantages of applying this concept. This cloud computing model consists of five essential features, three service models, and four application models, and the elaboration of these concepts will be an integral part of this chapter. Particular attention will be paid to the possibility of data abuse in cloud computing and regarding that data protection against manipulation from service providers as well as the financial aspect of cloud computing.